Journal
ECOLOGICAL RESEARCH
Volume 17, Issue 5, Pages 535-543Publisher
SPRINGER JAPAN KK
DOI: 10.1046/j.1440-1703.2002.00511.x
Keywords
Aphrophora pectoralis; apical dominance; compensatory shoot growth; Salix miyabeana; Salix sachalinensis
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We measured the effects of oviposition by the spittlebug Aphrophora pectoralis on shoot growth and bud production in two willow species, Salix miyabeana and Salix sachalinensis . In autumn, adult females of A. pectoralis insert their ovipositor into the apical region of 1-year-old shoots, resulting in the death of most shoot tips within 1 week. Consequently, an increase in the number of dead buds and a decrease in the number of vegetative buds on 1-year-old shoots was recorded. In the following spring, the growth of current-year shoots was greatly increased on 1-year-old shoots damaged by spittlebug oviposition. Furthermore, spittlebug oviposition increased the production rate of vegetative buds in both S. miyabeana and S. sachalinensis . However, no impact on the production rate of reproductive buds was detected in either willow. We conclude that the compensatory growth of current-year shoots and an increase in vegetative buds in the two willow species was caused by oviposition of A. pectoralis .
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